3 years ago

I have no clue pls help

Chemistry

1 answer:

mihalych1998 [28]3 years ago

6 0

Answer:

Explanation:

A mixture is a substance made by combining two or more different materials in such a way that no chemical reaction occurs. A mixture can usually be separated back into its original components.

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Element: calcium symbol: Ca Atomic weight: g Mass of one mole: g/mol

Elena-2011 [213]

153g/mols I think this is the answer but not 100% sure.

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3 years ago

The volume of a container is 40 cm3. It has a length of 4 cm, a width of 2 cm. What is the height of the container?

PtichkaEL [24]

5cm
4x2 =8, 8x5 =40
so 4 x 2 x 5 = 40cm3

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3 years ago

Read 2 more answers

Oxycodone (C18H21NO4), a narcotic analgesic, is a weak base with pKb = 5.47. Calculate the pH of a .00500 M oxycodone solution.

Ganezh [65]

Answer:

pH = 10.11

Explanation:

Hello there!

In this case, since it is possible to realize that this base is able to acquire one hydrogen atom from the water:

$C_{18}H_{21}NO_4+H_2O\rightleftharpoons C_{18}H_{21}NO_4H^+OH^-$

We can therefore set up the corresponding equilibrium expression:

$Kb=\frac{[C_{18}H_{21}NO_4H^+][OH^-]}{[C_{18}H_{21}NO_4]}$

Which can be written in terms of the reaction extent, $x$ :

$Kb=\frac{x^2}{0.00500M-x}=3.39x10^{-6}$

Thus, by solving for $x$ we obtain:

$x_1=-0.000132M\\\\x_2=0.0001285M$

However, since negative solutions are now allowed, we infer the correct $x$ is 0.0001285 M; thus, the pOH can be computed:

$pOH=-log(x)=-log(0.0001285)=3.89$

And finally the pH:

$pH=14-pOH=14-3.89\\\\pH=10.11$

Best regards!

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3 years ago

If you touch a hot stove, the nervous system works closely with which other organ system to help your body react by pulling away

Rudik [331]

Answer:

2. Muscular System

Explanation:

The muscular system is associated with body motion. Hence, the right answer is option 2.

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3 years ago

How did organic compounds get their name? Explain how the word is related to its meaning.

crimeas [40]

The correct answer is that organic compounds get their name from its association with living organisms. The word "organic" means living. That's how they are related and that's how organic compounds get their name. I hope this answer helped you.

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3 years ago